针叶树材径向和弦向气体渗透的三维流阻网络

将针叶树材气体渗透的三维流阻网络理论进行了扩充 ,提出了气体径向和弦向渗透次级流阻网络的二维等效流阻网络及二维等效流阻网络流阻基元的确定和等效流阻的求解方法 ,将三维流阻网络从关于针叶树材气体纵向渗透性研究 ,扩展到针叶树材气体径向和弦向渗透性研究。提出了针叶树材径向和弦向气体渗透三维流阻网络理论 ,计算了马尾松试件径向和弦向渗透系数 ,并与测量值进行比较 ,结果表明两值相符合。将本文的针叶树材径向和弦向气体渗透三维流阻网络理论与此前关于针叶树材纵向气体渗透的三维流阻网络工作相结合 ,可以使用三维流阻网络计算针叶树材纵向、径向、弦向的气体渗透系数 ,其在木材干燥、改性、防腐有应用价值     

Effective Method to the Renormalized Finite Quantity of the Meson Loop Propagator (I)

By using the Lorentz invariable coupling model of interaction between neutral meson and nucleon (antinucleon), Feynman convergence integral method is often used to deal with the finite quantity of one-loop correction scheme. On the basis of analyzing, discussing and researching the method, a new method is found. That is the large momentum integral limitation method. With the effective method, we obtain the integral convergence formulation for the finite quantity, by deducting-dimensionally calculating the finite quantity gained after renormalizing the meson loop propagator.     

Effective Method Calculating the Renormalized Finite Quantity of the Meson Loop Propagator (II)

In the Lorentz Invariable Coupling Model of interaction between pion and nucleon (antinucleon), by applying the complex function integral method, the authors have strictly calculated the one-dimensional integral, which is derived from the great momentum integral limit, of the renormalized finite quantity of one-loop propagator and chain propagator in the momentum renormalization scheme and gained the finally strict analysis result. At the last, they have detailed these numerical results of the renormalized finite quantity, and also done the relevant discussion about these minute radiation corrections.     

Effective Expressions for Momenta Normalization and Renormalization to e-(e) Loop propagator

In the electromagnetic minimum coupling model, the authors study the expansion of the finite quantity function in the momenta renormalization e - e loop propagator function, and find that if they use the matrix function expansion they can approach the separation of the finite quantity function, but also can get a strictly analytic solution for one dimension integral calculation method of it. This will give an effective new way to study the question about the exact solving to the renormalization finite quantity function.     

Cross Section Between Nucleons with Chain Loop Correction

According to scattering theory, the lowest order cross section between nucleons is calculated. Besides, based on the Great Moment Integral Limitation and the Complex Function Integral Method, the corrected cross section is obtained by treating the pion propagator with chain approximation. The experiment results show that perturbation theory can be used to deal with strong interaction.     

Strictly Analytic Calculation to the Renormalized Finite Quantity of the Photon Loop(Chain) Propagator

In the minimum electromagnetism coupling model of interaction between photon and electron(antielectron),Feynman convergence integral method is often used to deal with the finite quantity of one-loop correction scheme.After analyzing,discussing and researching the method,a new method is found.That is the great moment integral limitation method.Through the method,the relative result is obtained.     

针叶树材纵向气体渗透的三维流阻网络

气体在木材中的渗透是通过木材内的孔隙通道进行 ,而木材内的孔隙结构非常复杂 ,在纵向、径向、弦向的连接特性均不相同。以往关于针叶树材气体渗透的模型或理论 ,只考虑针叶树材内气体渗透通道在 1个或 2个方向上的连接。本文根据针叶树材管胞流阻和管胞在纵向、径向、弦向的连接特性 ,建立了一个描述针叶树材纵向气体渗透性的三维流阻网络 ,并运用重正化变换求解出流阻网络的流阻 ,计算了针叶树材气体纵向渗透系数。所得马尾松木材气体纵向渗透系数计算值与其测量结果进行比较 ,两者十分吻合 ,表明本文关于针叶树材气体纵向渗透三维流阻网络理论的科学性